Bukkit

Hi,

i am having problem with your plugin - when i installed MSG.jar into plugins folder and restarted server and used /msg command this pops up in console output:

issued server command: /msgissued server command: /msg

[20:15:29] [Server thread/ERROR]: nullorg.bukkit.command.CommandException: Unhandled exception executing command 'msg' in plugin MSG v2.0 at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[craftbukkit.jar:git-Bukkit-d27e6d0] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) ~[craftbukkit.jar:git-Bukkit-d27e6d0] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:619) ~[craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1106) [craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:966) [craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:37) [craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(SourceFile:9) [craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit.jar:git-Bukkit-d27e6d0] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_171] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_171] at net.minecraft.server.v1_8_R3.SystemUtils.a(SystemUtils.java:19) [craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:672) [craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:335) [craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:628) [craftbukkit.jar:git-Bukkit-d27e6d0] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:536) [craftbukkit.jar:git-Bukkit-d27e6d0] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171]Caused by: java.lang.NullPointerException at playincod3142.MSG.MSG.onCommand(MSG.java:97) ~[?:?] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[craftbukkit.jar:git-Bukkit-d27e6d0]

Could you please help me what i am doing wrong?

Thank you.